T(n,k)=Number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).
A207868
T(n,k)=Number of n X k nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or vertical neighbor (colorings ignoring permutations of colors).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =2a(6) =5a(7) =34a(8) =34a(9) =5a(10) =15a(11) =500a(12) =2052a(13) =500a(14) =15a(15) =52a(16) =10900a(17) =278982a(18) =278982a(19) =10900a(20) =52a(21) =203a(22) =322768a(23) =68162042a(24) =455546040a(25) =68162042a(26) =322768a(27) =203a(28) =877a(29) =12297768
External references
- oeis: A207868